Design method of dual-polarization orbital angular momentum state multiplexing metasurface

Abstract

The invention discloses a design method of a dual-polarization orbital angular momentum state multiplexing metasurface, and belongs to the field of electromagnetism. The method specifically comprisesthe following steps of firstly, designing an anisotropic unit of a dual-polarization reflection metasurface, simulating a unit structure, and establishing a corresponding relation between the size ofthe unit structure and a reflection phase; secondly, designing a metasurface for a beam of dual-polarized electromagnetic waves, modulating incident waves into vortex electromagnetic waves, deflectingthe vortex electromagnetic waves to the direction perpendicular to the metasurface, and calculating the conditions needing to be met by the reflection phase of the metasurface; on the basis, modulating multiple beams of dual-polarized electromagnetic waves with different incident angles into vortex electromagnetic waves at the same time and deflecting to the same direction perpendicular to the metasurface, and calculating the conditions needing to be met by the reflection phase of the metasurface when the coaxial output is achieved; and finally, setting the incident directions of the multiplebeams of electromagnetic waves, and modeling in combination with the phase distribution condition of each unit of the metasurface to obtain the dual-polarization orbital angular momentum state multiplexing metasurface for verification. According to the present invention, the unit structure is simple, and functions are easy to achieve.

Description

technical field [0001] The invention belongs to the electromagnetic field and relates to microwave radio frequency technology, in particular to a design method of a dual-polarized orbital angular momentum state multiplexing metasurface. Background technique [0002] With the rise of the Internet and intelligent terminals, the demand for mobile communication services has grown rapidly, and the requirements for indicators such as data transmission rate, transmission delay, and throughput of wireless communication systems are also increasing. However, the high-quality spectrum resources in the low frequency band are very limited, and it is difficult to meet the new demands of communication only by dividing the new spectrum. At present, the shortage of spectrum resources makes the existing wireless communication technology unable to meet the needs of social development. Therefore, it is of great significance to deeply explore the potential of wireless communication technology in...

AI Technical Summary

Problems solved by technology

However, in the application of electromagnetic wave orbital angular momentum multiplexing in the microwave frequency band, the current generation method cannot simultaneously generate coaxially transmitted electromagnetic waves carrying multi-modal orbital angular momentum

Images